| 摘要 |
<p>A zoom lens is provided. The zoom lens includes a positive power first lens group (12) having a first lens element and a second lens element, and a negative power second lens group having a third lens element. The first lens element can be made from plastic having either or both of its surfaces aspheric with a meniscus shape concave or convex to an object side. The first lens group includes a variable iris having a mechanical aperture stop positioned between the first lens element and the second lens element. <IMAGE></p> |
